Load-controlled brake.



J. B., e. J. a. s. B. GRAY..

LOAD ooNTRoLLBD BRAKE. VAPPLIUATIO FILED JUNE 6. 1908.

'Patented Deo. 29, 1908.

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7c-265.5. Gray @dries/ Q2' 1 Amm/Era i L 5.,' c'. Jr & s. B. GRAY. LOADUONTROLLBD BRAKE. APP'IUATIOH FILED JUNE B, 190B.

Patented Dec.29, 1908.

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LOAD GONTRGLLED BRAKE.

APPLIUATION FILED :Ulm '3,11908.

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JOEL B. GRAY, OHARLRs J. cRAY7 AND sEYMooR B. GRAY, OF OTTAWA, KANsAs.

LOAD-CONTROLLED BRAICE Specification of Letters Yatent.

Patnyd Deese, loos.

Appncaaonmed .rune e, 190s. serai N. 437,083.

of Ottawa, in the county of Franklin lindr State of Kansas, haveinvented a new and- Improved Load-Controlled Brake, of which thefollowing is a full, clear, and exactdescri tion.`

T is invention is an improvedbrake for railway cars, having in View theprovision of supplementary means for shifting the fulcrums ofthe brakingor floating levers, toy compensate for the dierence inl power' requiredto check the speed or bring the car to a stop when in loaded andunloaded. conditions. To this end we have constructed such a device,automatic and positive in action, which may be applied to the well-knownty es of brakes now in general use.

Feference is to be vhad to the accompanying drawings forming a Apart .ofthis specifica-4 tion, which similar' characters of reference indicatecorresponding parts inall the views.

Figure 1 is a plan of a brake with our imrovements applied thereto,'showing the body of the car, Wheels, etc. in dotte out line; Fig. 2 isa fragmentary longitudinal vertical section at one side of the brakecylinder; Fig. 3 is a 4horizontal section just above the brakecylinder', showing the parts in osition when the brakeis off and the carun oaded; Fig. 4 is a cross-section in advance of the forward end of thebrake cylinder Fig. 5 is a view similar to Fig. 3, showing the positionvof the parts when the brake is Off and the-'car loaded; Fig. 6 is asection through the car truck, showing the actuating devices of ourimcprovement in position when the car 1s unloa ed Fig. 7. is a plan ofthe said devices ,z and Fig. 8 is a section similar to Fig. 6, showingthe osition -assumed by the actuating devices w en the car is loaded.

In Fig. 1 we have shown a complete braking systemI applied to acar 10,and embodying our improvements. This braking sys tem comprises the usualbrake cylinder 11, having the iioating Or braking levers 12 and 13,respectively fulcrumed at op osito ends, which are connected with thebra re beams 14 at the o posite Aends of the car through the intermeciary of connecting rods or links 15, levers 16, rods or links 17 andlevers 18, the last mentioned rods and'levers extending between theAouter and inner brake beams.

-The Hoating'lever v12 `is fulcrumed to the iston of the brake cylinderand entende` to oneside thereof where it is connected with a rod or link19 passing to a hand-brake, as is the lusual practice.

In applying our improvements to a brake of this character, the fulcrumins ofthe connecting rod 20 which extends between the floating levers 12and 13, instead of being iiXed are slidable longitudinally of theselevers,4for, which purpose the said levers are constructed with slots 21having inwardly offset or converging extremities, as best shown in Fi s.`3 and 5. The connecting rod 2O is normally forced toward the brakecylinderby springs 22, which draws the fulcrums of the floating leversinwardly and. reduces the leverage. For. automatically drawing thislever from the brake cylinder to increase the leverage as the carisloaded, we provide bell-crank levers 23 pivotally supported ondepending bolts or pins, these levers, as shown, being constructed witha substantial boss at the intersection of their arms to give themsuilicient strength. One arm of each bell-crank lever is connected tothe fulcrum of the adjacent lever by a link 24, and the other arms ofthe bell-crank levers are pivoted to an actuating rod or bar 25 whicheX- tends to one pair of the car trucks, .as shown in Figs. 1, 6, 7 and8, where it is pivoted to a latch 26, the latter being fulcrumed withina vertically slotted casting 27 and constructed with a notch 28 on itsworking face designed Vto engage, when the car is unloaded, on thecorner or shoulder of a post or projection '29, the post being carriedon a fixed portion of the truck, and the casting 27 on which the latchis formed being attached to the yielding bolster. lith the car unloaded,the latch 26 will be inthe position shown in Fig. 6, and the connectingrod will be in the position shown in Fig. 3. When the car is loaded, thetruck bolster will be depressed, forcing the latch 26 against the postor projection 29,

which, by reason of the inclined or cam face of the latter, will causethe latch to assume an approxlmately vvertical position and pass to theside of the post, as illustratedin Fig. 8,

shown in Fig. 4, thus increasing the leverage position;

- claim, 'as new and desire Patent:

Having thus described our invention, We to secure by Letters l. Thecombination of a truck, a brake cyl`- inder, braking levers connected tothe cylinder, means normally tending to drawthe fulcrums of the leversin one direction, and

. means connected to relatively movable por-` tions of the -tr'uck formoving the fulcrums of the levers in the opposite direction against thetension of said means.

2. The combination of a brake cylinder, a truck having a yieldingbolster, slotted braking levers pivotally supported on the cylinder, aconnecting rod having fulcrum pins slidable in the slots 'of the levers,springs tending to draw the connecting rod toward the cylinder,bell-crankilevers, to one arm of each bell-crank lever, links-connecting the other arms of the bell-crank levers with the fulcrumpins, a latch pivoted to the actuating bar and fulcrumed on the yieldingtruck bolster, and a ost for engaging the latch and moving said) barwhen the `truck bolster is depressed.

3. The combination of a brakinff mechanism, a truck, braking levers, allatch fuly crumed on a yielding part ofthe truck, o eratively connectedwith the 'ulcrums oft e levers, and means carried by the truck forswinging said'latch on its fulcrum and shifttruck is depressed.

, bell-crank levers,

an actuating bar connected ing the fulcrums of the levers when the saidyieldin part of the truck is de ressed.

4. T e combination of a bra 'ngA mechanism having braking levers, atruck, bellcrankleversres ectively connectedto the ulcrums of the rakinglevers', a latch fulcrumed on the yielding portion of the truck, anactuating bar connected to the latch and bell-crank levers, and meanscarried by a lixed art ofthe 1truck for swinging the latchyin a irectionto increase the leverage of the braking levers when the yielding part ofthe 5. In combinatiomwith a car, means 'therefor including floatinglevers,

l each having an arm connected with the fulcrurn of one of the lioatinglevl rs, a bar connected to the other arms of the levers, and meanscontrolled by the load of the car for actuating said bar` to shift thefulcrums of the floating levers.

6. The 'combination' of a car having a yielding truck member throughWhich the -carload is transmitted and a relatively fixed truckv member,braking means for the car, having levers, 'and coperating devices forshifting the fulcrums of said levers, respectively connected to saidmembers.

ln testimony whereof we have signed our 'names to this specification inthe presence of two subscribing Witnesses.

Witnesses H. H. HAYES, F. C. DoBs'oN.

braking l

